a-ak a-be aaaa aaab aaac aaae aaam aaba aabb aabc aabm aaca aacb aacc aace aack aacm aaea aaec aaem aaka aake aama aamb aamc aame abaa abab abac abae abak abam abb- abba abbb abbe abca abcb abcc abec abee abma abmb abmc acaa acab acac acae acba acca accc acce accm ace- acea acec acek acem acke acma acmc acme aeac aecb aeka akaa akae akam akca akee akka amaa amac amae amam amb- amba ambe amca amcc amec amee amka amm- amma amme baaa baak baam baba babb babe babm bac- baca bacc bace back baek bak- baka bake bama bamb bamc bame bamm bbbb bbcm bbeb bcaa bcam bcbc bcca bccc bccm bcec bcma beak beam beba bebb bebe beca beck beeb beek beem beka beke bema beme bmaa bmce caaa caab caac caam caba cabe cac- caca cacc cace cack cacm caec caem caka cake cama camb camc came camk camm cbac cbbc cbca cbcc cbce cbcm cbea cbec cbee cbka cbkm cbme ccaa ccab ccac ccam ccba ccbc ccca cccb cccc cccm ccee cckm ccma ccmb ccmc ccmm ceac ceba cec- ceca cece cecm ceeb ceec ceem ceke cema cemb ceme cemm ckac ckbc ckbe ckck ckcm ckem cmaa cmac cmba cmbc cmcc cmea cmec cmmb cmmc eaba eaca eacc eaec eama eame ebac ebam ebba ebbc ebcc ecaa ecac ecam ecbc ecbe ecca eccb eccc ecce eccm ecem ecka ecma eeca eeea eeee eeka eeke eka- ekab ekam ekeb ekek ekka ekma emac emae emam emba embe emcc emek emma emme kaaa kaab kaak kaam kaba kabb kabc kabe kacb kacc kace kaka kakc kake kakk kakm kam- kama kamb kamc kame kamm kbaa kbab kbac kbae kbak kbam kbba kbbb kbbc kbbe kbbk kbbm kbca kbcb kbce kbck kbeb kbec kbee kbek kbkb kbkk kbmb kbmc kbme kcaa kcab kcac kcam kcba kcbc kcbk kcca kccb kccc kcck kcea kceb kcec kcee kckc kckk kckm kcmb kcmc kcme kcmk kcmm kea- keak keam keba kebb kebc kebe keca keck keek keem keka kekb kekc keke kema kemb kemc keme kemm kkaa kkac kkam kkba kkbb kkbe kkcb kkck kkcm kkea kkkk kkma kkmc kkmk kmac kmae kmak kmam kmbc kmca kmcb kmcc kmce kmcm kmea kmem kmke kmkk kmme kmmk kmmm maaa maac maak maam maba mabe mac- maca macb macc mace mack maee maem maka make mama mamc mame mbac mbam mbba mbca mcaa mcac mcba mcbc mcca mccc mckk mcmc meak mebe mec- meca mecc mece meck meek meem meka meke mema memc meme mkak mmaa mmab mmac mmcc mmcm mmea mmmc mmmm